High pressure steam generator



Dec. 1, 1931. R. KLEIN 1,334,282

HIGH PRESSURE STEAM GENERATOR Filed July 28, 1928 my a.

Q Q U a Patented Dec. 1, 1931 UNITED STATES PATENT OFFICE RUDOLF KLEIN, or WINTERTHUR, SWITZERLAND, ASSIGNOR- TO THE FIRM screen rnnnns socin'rn ANONYME AT WINTER'II-IUR HIGH PRESSURE STEAM GENERATOR Application filed July 28, 1928, Serial No. 295,976, and in Switzerland August 11, 1927.

This invention relates to high-pressure steam generators of the upright water-tube type and consists in the upper drum, which 1s connected in the usual manner by a nest of 5 tubes to a lower drum, being provided with a further nest of tubes consisting of watertubes bent in the form of a U, both ends of such tubes "being connected to the upper drum. The nests of tubes can also be arranged with respect to each other in a corner enclosing the-furnace chamber in such a way that one nest forms the roof of the chamber and the other the rear wall. The lower drum may be connected to the nest of tubes forming the roof of the chamber. The nests of tubes at their lower ends rest freely on fire bridges so that they are protected from the hottest gases at the lower parts and can expand freely lengthways. A battle is with advantage fitted in the rear nest of tubes to compel the smoke gases to How first along the tubes in the upper nest and then along those in the rear one.

Two constructions according to the invention are illustrated by way of example in the accompanying drawings.

Fig. 1 is a vertical sectional View of one of the modifications; Fig. 2 is a vertical sectional view of the other modification and Fig.

3 is a cross-section of Fig. 2 at 3 and shows the fire bridge provided with hollowed out parts in which the outer tubes 7 rest.

a is the upper drum and b the masonry setting of an upright water-tube boiler fitted with a travelling grate 0. The upper drum is fitted, in addition to a first nest of watertubes 6 having a lower drum (Z, also with a second nest of water-tubes 7, which in contrast to the first consists of water-tubes bent in the form of a U and connected at both ends to the upper drum. The nests of tubes are also arranged with respect to one another in a corner enclosing the furnace chamber, in such a way that one of them forms the roof 3 of the chamber and the other the rear wall.

In the construction according to Fig. 1, the

arrangement is such that the nest of tubes connected to the lower drum forms the rear wall of the furnace chamber, whilst the nest consisting of the U-shaped tubes forms the roof. On the other hand, in the construction according to Fig. 2, the nest connected to the lower drum forms the roof and the nest with the U-shaped tubes the rear wall of the furnace chamber. In both constructions the lower ends of the nests of tubes rest on fire bridges in such a way that the lower parts are protected from the hottest gases and are free to expand lengthways. In the rear nest of tubes a battle 9 is fitted to compel the smoke gases to flow first along the tubes of the upper nest and then along those of the rear one.

I claim:

1. In a high-pressure steam boiler of the upright water-tube type having an upper drum, a lower drum, tubes connecting the upper to the lower drum, and a second set of tubes connected to the upper drum in the form of a U having both ends attached to said upper drum, one of said two sets of tubes i forming the roof of the furnace chamber and the other the rear wall thereof, and a battle member fitted to the set of tubes forming the rear wall, said baflie member being constructed to direct the furnace gases first along the upper set of tubes and then along the rear set of tubes.

2. In a high pressure steam boiler of the upright water-tube type an upper drum, a lower drum, tubes connecting the upper and lower drums to form the roof of the furnace chamber, a second set of tubes connected to the upper drum in the form of a U having both ends attached to said upper drum, said second set of tubes forming the rear wall of the furnace chamber, and a baffle member fitted to the tubes forming the rear wall and so constructed as to direct the gases first along the upper set of tubes and then along the rear set of tubes.

In testimony whereof I have affixed my signature.

RUDOLF KLEIN. 

